Queen Elizabeth II celebrated her 92nd birthday today

How do you celebrate birthdays when you're the Queen of England and the longest ruling monarch in the UK? You make a day of it, and that's exactly what her Majesty did.

Her Majesty Queen Elizabeth II turned 92 years old today and received a smattering of well wishes in various forms including written notes, gun salutes and marches.

Another beautiful day in London as we prepare to celebrate Her Majesty’s 92nd Birthday. We’ve got a very special changing of the guard, Gun Salutes at Hyde Park at noon and at The Tower at 1pm. All free to watch. Join us if you can. Happy Birthday Ma’am! pic.twitter.com/fOhnILwnu4

— The Army in London (@ArmyInLondon) April 21, 2018

A special version of the changing of the guard happened in honour of the Queen's big day, with the Gun Salute firing off at Hyde Park and an hour later at The Tower.

Happy 92nd birthday to HM Queen Elizabeth II #Queensbirthday @RoyalFamily from the loyal #Falklands #FalklandIslands . We have a #BankHoliday, #Parade, #21GunSalute & @RoyalAirForce #Flypast to celebrate. #HappyBirthday pic.twitter.com/qvTIfLDzeO

— FalklandsinUK (@FalklandsinUK) April 21, 2018

In the evening, she celebrated with the Duke of Cambridge and the Prince of Wales at the Royal Albert Hall for a special concert, with performances by Tom Jones, Shawn Mendes and more.

After Mendes' performance, he tweeted, "What an honour, such an incredible night."

🎥 | Check out Shawn Mendes performing for THE QUEEN’s 92nd birthday party at The Royal Albert Hall in London tonight! He killed it!!!! pic.twitter.com/IImbr1ZIyD

— Shawn Mendes Updates (@ReportingMendes) April 21, 2018

Prince Harry and Megan Markle were also in attendance.

The Queen sits next to The Duke of Cambridge and The Prince of Wales at the @RoyalAlbertHall for the concert this evening, which celebrates Her Majesty’s 92nd Birthday.#QueensBirthday pic.twitter.com/AA0McKn9vH

— Kensington Palace (@KensingtonRoyal) April 21, 2018

Queen Elizabeth II remains the longest-ever ruling monarch, with 65 years of constant service to the monarchy. She's lived through 21 UK prime ministers and 16 United States presidents.

Happy 92nd Birthday to Her Majesty The Queen!#QueensBirthday #HappyBirthdayHerMajesty pic.twitter.com/6FqHbsJmyN

— The Royal Family (@RoyalFamily) April 21, 2018

She took the throne as queen at age 25, when her father, King George VI, died in the winter of 1952.